And stephen



'G. H. BABGOCK & S. WIL'GOX.

Flre-Door for Fulnaoes No. 224,626. Patented Feb. 17, 1880.

R /lTNE-SSES2 NPETEFS, FHOTO-LITHOGRAPHER, WASHINGTON, D.-C.

UNITED STATES PATENT OFFICE.

GEORGE H. BABOOGK, OF PLAINFIELD, NEW JERSEY, AND STEPHEN WILGOX, OFBROOKLYN, NEW'YORK.

FIRE-DOOR FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 224,626, dated February1'7, 1880.

Application filed October 18,1878.

. To all whom-it may concern:

, turned on its axis by the slicing-instrument or other means, so as toraise the flap sufficiently to allow of the slicing-instrument beinginserted into the furnace, and after the flap has been raised into thedesired position it is retained. out of the way by means of a curvedrackhinged thereto and extended upward and outward through a slot in thefur- Dace-door. It is of such length that, whether theslicing-tlap isopen or closed, the end of the rack shall always protrude through thefront of the furnace-door. It engages by gravity, and is released by alifting blow at will to allow the flap to close.

The following is a description of what we consider the best means ofcarrying out our invention.

The accompanying drawings form part of this specification.

Similar letters of reference are used to denote like parts wherever theyoccur.

Figure 1 represents a front view; Fig. 2, a vertical-section of afurnace-door with our improvements applied thereto. Fig. '3 represents adetailed section of part of the same,

showing the slicing-flap raised into the position it will assume whenthe fire is being sliced or raked.

A represents the furnace-door and A the furnace-door mouth.

-B represents an opening in the furnacedoor, whichis covered orcontrolled, when desired, by means of a slicing-flap, O, which ispivoted to bearings a carried by the furnace-door A.

The pivoted slicing-flap O is capable of being raised, when desired, bythe insertion of the slicing-instrument or poker, and when so raised itis held open by means of the mental rack D, which at d is pivoted to theslicing-flap.O, and on its under side is provided with a series ofteeth, 01, arranged to operate with the under side of the slot A in thefurnace-doorA in such manner thatin whatever position the slicing-flap Ois raised by the slicing-instrument or poker the slicing-flap will beretained in such position until the slicing or poking operation has beencompleted. After the slicing or poking operation has been completed itissimply necessary to knock up the end D of the segmental rack Dsufficiently to liberate thetooth d,forthe time engaged with the bottomof the slot A when theslicingflap G will fall of its own gravity intothe position shown by Figs. 1 and 2, thereby closing the aperture Buntil the fire is again required to be sliced or poked.

The curved rack or catch D d, being set in the position shown, pivotedon the inner side of the flap O, and reaching up and catching in theslot Aabove, is entirely out of the way of the slicing-instrument, andcannot be disturbed thereby in the ordinary working, but only whenintentionally struck up after the slicing is completed. 1

, We do not claim a door within the main the door but We claim as ourinvention- The curved rack or catch D (I, in combination with theslicing-flap G, and arranged in the main fire-door A, all operatingtogether substantially as and for the purposes herein GEO. H. BABOOGK.STEPHEN WllLOOX.

Witnesses:

L. O. WARNER, Units. 0. STETsoN.

